Re: SJ23 hull finishing question

It sounds like you may need to remove at least part of the gelcoat layer
and see what's underneath.
If you sand it down a bit and the stain goes away, just fill in the
depression and restore the finish. If things look worse after you have
sanded for a while, you may be starting a new career. Get a good
color match, feather the gelcoat so you don't have to do the entire hull,
and then buff it out.
I repaired some deep gouges with Formula 27 and gelcoat, and there
is a real trick to making it come out even. I haven't quite mastered the
art yet, but you never learn if you don't try.
Jack Chandler
On 11 Jun 2004 at 12:09, splinky 3000 wrote:
Hey Everybody,
I am refurbishing an SJ23, the hull has some discoloration patches (roughly
8" diameter, various locations) that I am trying to remove/fix.
Initially I thought these patches were just exterior water stains that would
disappear with polishing/buffing, but didn't. Upon further inspection, the
stains seem to be below the gel coat surface; the surface is still nice and
smooth with no blisters, cracks, etc., so I am wondering if the gel coat
became porous in some areas allowing moisture to seep through.
I tried applying a mixture of TSP and oxalic acid, this didn't seem to do
much. Next thing I tried was some FSR, which is just strong oxalic acid in
a gel - I was thinking this might permit soak into the surface more readily;
this didn't work either.
Has anybody seen this phenomenon before? Any way to remove these patches?
Is a new paint job the only solution?
Any suggestions are greatly appreciated, Thanks!
- Mike
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Chris Chandler
Richland, Washington USA
www.jack-chandler.com
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